Registration Dossier
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EC number: 434-280-4 | CAS number: -
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
The rate of hydrolysis of the test substance was assessed according to EU Test Method C7.
The estimated half-lives at 25°C of the phosphoric acid mono-ester content, the phosphoric acid diester content, and the alkyl amine component of the test material were > 1 year.
No assessment of hydrolytic stability was performed for the phosphorodithiotic acid ester component of the test material by Method C7 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67 /548/EEC). This was due to low solubility in aqueous media.
Key value for chemical safety assessment
- Half-life for hydrolysis:
- 1 yr
- at the temperature of:
- 25 °C
Additional information
The rate of hydrolysis of the test substance was assessed according to EU Test Method C7. Sample solutions were tested at pH 4, pH 7 and pH 9 for a period of 120 hours. After 5 days at 50 °C there was less than 10 % hydrolysis, equivalent to a half-life greater than 1 year at 25 °C. The absence of relative percentage composition data prevented the calculation of definitive concentrations for the component of interest. Therefore, although monitored individually, the concentrations were with respect to the test material as a whole. The estimated half-life at 25°C of the phosphoric acid mono-ester content, the phosphoric acid diester content and the alkyl amine component of the test material was > 1 year.
No assessment of hydrolytic stability was performed for the phosphorodithiotic acid ester component of the test material by Method C7 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67 /548/EEC). This was due to low solubility in aqueous media.
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